# Nix Solo vs AbsolutSweat

The clearest difference is device support: Nix Solo at 4 against AbsolutSweat's 2. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Nix Solo ships an update every 10 days, AbsolutSweat fortnightly. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Nix Solo | AbsolutSweat |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (68 ratings)](https://appshunter.io/ios/app/nix-solo/id1632680170/reviews)** | — |
| Number of ratings | **68** | — |
| Positive reviews | 14.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 days** | Fortnightly |
| Monetization | Free | — |
| Size | 65 MB | 42 MB |
| Requires iOS | **15.1** | 15.6 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nix, Inc.](https://appshunter.io/developer/1625732872) | [Shenzhen Refresh Biosensing Technology Co., Ltd.](https://appshunter.io/developer/1405391433) |

## What reviewers say

### Nix Solo

[App page](https://appshunter.io/ios/app/nix-solo/id1632680170)

Monitor personal fluid and electrolyte losses in real-time during workouts. This app provides insights into sweat composition and hydration needs based on individual biology, using data from a companion biosensor.

**Highlights:** Real-time fluid and electrolyte loss monitoring, Personalized sweat composition insights, Correlates sweat data with environmental factors (Nix Index), Post-workout Sweat Intelligence reports, Integration with Apple Watch and Garmin devices, Workout type and hydration input

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### AbsolutSweat

[App page](https://appshunter.io/ios/app/absolutsweat/id6443573387)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Nix Solo free?

Nix Solo is free to download, with no in-app purchases.

### Is AbsolutSweat free?

AbsolutSweat is free to download, with no in-app purchases.

### Do Nix Solo or AbsolutSweat have ads?

Neither Nix Solo nor AbsolutSweat shows ads.

### Which is updated more often, Nix Solo or AbsolutSweat?

Nix Solo ships an update every 10 days, and AbsolutSweat fortnightly. Most recently, Nix Solo was updated on October 27, 2026 and AbsolutSweat on October 25, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*